The father of Zheng Gongdong and the old master of the Zheng family. He deeply cared for his son and was the one who went in alone to save Zheng Gongdong when he got into trouble. He was furious that Zheng Gongdong cheated on Zhou Qing, who had been so devoted to his son. Zheng Du could not stand the sight of his son after the betrayal and decided not to see him again. He was described as being so furious that he practically stomped around at home every day.
